Typewriting machine



Y .1,551,910 l WALDHEIM TYEWRITING vMACHINE "Fried sept. 2o. 1921 Sept. 1, |925.

'is sheets-sheet 1 Sept. l, 1925.

l J.. WLDHIM NPI-:WRITING MACHINE:

'Filed sept. 20. 1921A 3 sheets-sheet 2 Patented Sept. 1, 1925.

UNITED STATES PATENT OFFICE.

JOHN WALDI-IETM, OF ELIZABETH, NEW JERSEY, ASSIG-NOR T* UNDERWOOD TYPE- WRITEROOMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITTNG MACHINE.

Application filed September 20y 1921. I Serial No. 501,998.

To all wiz/0m t may concern.'

Be it known that I, JOHN VALDHEiM. a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specitica-tion.

This invention relates to sound--deadening devices for typewriting machines.

To deaden or Inutile the sound of the machine, itl has been proposed to enclose it by a soi'ind-deadcning cabinet or casing, allowing` only the keyboard section of the machine r and variousfinger-pieces on the carriage to extend from the cabinet so that the inacliine may be operated. e

A teature'ot the present invention is to have the frame ot the machine form part ot the casing, thus avoiding the necessity of a separate casing or cabinet. i

To this end the usual openings in the frame, through which access may be had to the interior mechanism, are sealed with closures. and the upper part of the machine is provided with a dome extending over the traine beyond its sides to form a chamber in which the carriage operates.

The front wall of the main frame is provided with a releasable plate to close the usual opening therein, said plate having lateral extensions and being effective to close the carriage chamber at the front.

A work-sheet chamber is provided at the rear of the machine int-o which hang the ends of worlcsheetsyfrom the carriage, said chamber extending downwardly from the carriage chamber and forming a closure for the rear opening in the frame.

This arrangement is not only pleasing in appearance and occupies less space on a support, but since the parts formingV the carriage chamber and the work-sheet chamber are integral with the Jframe they are morev rigid. Further the machine may readily be transported with its `chambers asa single unit.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a side view, vertically sectioned, of an Underwood Standard typewriting machine with the sound-deadening devices applied thereto.

Figure 2 is a side elevation of the device shown in Figure 1.

-Figure 3 is a disassembled perspective view of the sound-deadeningl devices.

`-Fig1ire 4: is afperspective view of the device shown in Figure 1.

Figure 5 is a ytrout elevation, partly sectioned, of the device shown in Figure 1.

Figure 6 is a plan view of' the device shown in Figure 1, with certain of the sound-deadening devices removed.

The Underwood Standard typewriting machinecomprises a main yframe 10 and a loi-ward extension 11, in which are positioned banks of keys 12 at the ends of keylevers 13 operating in a guidelplat-e or combplate 15, said key-levers operating type-bars la to cause typeslcarried thereby to print against a platen 17 mounted in a platenframe 18. Said frame vforms part of a carriage 2O mounted r `for `letteit'eeding Inovement upon a :trontrail 21 and a rear rail 22 on the main frame. The carriage is pro.- vided with various forwardly-extending handles, such as a line-space handle 25. i

The machine, as described above, has openings at thebottorn, sides, back, top and front, through. which sounds produced, in the typingl operation may be transmitted to the outside, and sound-deadening mea-ns is provided for closing each of said openings. For closing the bottom opening, there is provided a closurev member 30, which may ybe in the Tt'orm'of a pan-shaped plate hav- .ing at its upper edges outwardly-extending ianges 31, to bear against the lower edges ot the typewriter frame. The plate may be supported upon feet 32 similar to the usual typewriter supporting feet., and may be iXed to the main frame preferably by screws 33, which extend upwardly through. the feet and into the usual corner posts 35 of the typewriter frame. The typewriting machine is thus fixed in position relatively to the plate, and both the machine and the plate are supported upon said Jfeet 32.

At the front. of the machine, there is an opening between the guide-plate 15 and the base and an opening above the key-levers in which the type-bars are disposed. For closing the opening beneath the combplate, the plate 30 may be pro-vided at the front with an upward extension 38, which extends from the plate 30 to the guide-plate to which it may be attached, slots 40 being provided for the passage of the usual arms or levers supporting the space-bar. rl`he opening above the key-levers is closed by a front plate il supported upon the machine in any suitable To close the opening at the top of the machine, it is necessary to provide a closure which form chambers-in which the typewriter-carriage 'and the work-sheets which it carries may operate freely. E or this purpose, there: are provided horizontal extensions 52 fixed preferably to flanges 53 on the upper edges of side plates 50'and having' front flanges 54 fixed to the front plate ll, said front plate and extensions thus mutually .supportingl each other. A container or chamber G0, which may be closed except at the top, isfprovided at the rear of the machine, the overhanging ends of work-sheets carried by the typewritercarriage operating in said container. Said container extends between the extreme side edges of the horizontal extensions 52, and is supported upon sidev flanges 62 and depending flanges 63 on said extensions and upon the rear flange 3l of the bottom plate 30. rThe-container (SO thus forms vertical extensions at the rear and side edges of the typewriter, and'serves a closure for 'the rear o'lz-eningl in the typewriter frame. To close the openings at the top, there is provided a cover which extends from one side flange 62 of the horizontal extension 52 tothe other and fromthe front plate 4l to Vthe rear wall 66 of the container G0. rllhe cover thus completely covers the opening at the top, regardless of the positionA of the typewriter-carriage and its work-sheets. Preferably, the cover is hinged to the upper edge of rear wall 66 of the chamber GO, and is swung upwardly when access to the machine is desired, the upward movement being facilitated by a spring 7l fixed at one end to an arm 7 2 carried `bv the cover and at the other end to a lug 73 upon the horizontal extensions 52 secured to the machine frame, and normally tending to open the cover, the weight of the cover being sufficient toV hold it closed. rlhe cover may be provided with a window 7d to permit the typewriter carriage and the work-sheets positioned therein to be viewed. A

The cover has a front wall SO, which terminates some distance above the top of front plate 4l to form a slot through which the various carriage-operating handles, such as line-space handle 25, extend. rlhe slot is closed preferably by co-operating cushions 8l and 82 fixed upon thelfront wall 8O and front plate all, respectively.

To thoroughly close the dome when the cover is down, the side walls of the cover overlap and engage the outer faces of the side flanges 62 on the lateral extensions 52, Figure 5. To arr-est the cover in its closed position, it is provided with shoulders 85 (Figures 3 and d), which engage the upper edge of the front plate 41. Y

It is apparent from the above description that all of the openings from the interior of the machine to the outside are closed by the various closure elements, and that said elements are carried by the machine. All of the various closures may be provided with linings 86 of sound-deadening material. l

The sound is substantially confined in a space which is substantially walled in with sound-absorbing material forming the plate linings, so that the sound may be reflected from wall .to wall and gradually become absorbed.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. Sonnd-deadening means for va typewriting machine having a frame and feet at the four corners thereof, said sound-deadening means comprising a plate inserted between said feet and said frame and extending` to the rear of the frame to form a shelf, and a closure for the back of the frame resting on said shelf.

2. Sound-deadening means for a typewriting machine havingr a frame and feet at the four Corners thereof, said sound-deaden- .ing means comprising` a plate inserted between said feet and said frame and eX- tending` to the rear of the frame to form a shelf, and a closure for the back of the frame resting on said shelf, said closure for the back of the frame comprising a pocket to receive the end of a work-sheet extending downwardly over the back of the machine and to permit movement of the worksheet laterally of the machine.

3. Sound-deadening means for a typewriting machine having a frame, key-levers in the lower part of the frame and projecting from the front thereof, a key-lever comb-plate at the front of the frame, and feet at the four corners of the frame, said sound-deadening means comprising a plate inserted between the feet and bottom of the frame to close the bottom of the frame, and having an upwardly-extending flange at its forward edge to cooperate with said combplate to prevent the escape of sound beneath the key-levers.

4. Sound-deadening means for a typewriting machine having a frame with side openings and a carriage to travel on said frame, said sound-deadening means compris- `ing closures for said side openings fastened to the outside of said frame, lateral extensions to accommodate the travel of said carriage and secured to said side closures, a pocket secured to said lateral extensions at the rear and extending downwardlyover the rear of the frame to close the back thereof, said pocket also serving to accommodate a work-sheet extending downwardly from the carriage and traveling therewith laterally of the machine, and a cover hinged to the back of the pocket and closing said lateral extensions when in lowered position.

5. Sound-deadening means for a typewriting machine having a frame with side openings and a carriage to travel on said frame, said sound-deadening means coinprising closures for said side openings fastened to the outside of said frame, lateral extensions to accommodate the travel of said carriage and secured to said side closures, a pocket secured to said lateral extensions at the rear and extending downwardly over the rear of tlie frame to close the back thereof, said pocket also serving to accommodate a work-sheet extending downwardly from the carriage and traveling therewith laterally of the machine, a cover hinged to the back of the pocket and closing said lateral extensions when in lowered position, and a closure for' the bottom of said frame spaced above the support on which the typewriter' rests and secured to said pocket at its rear.

6; Sound-deadening means for a typewriter having a frame and a traveling carriage thereon, said sound-deadening means comprising side closures attached to the frame on the outside thereof, a body having lateral carriage-travel-accommodating extensions to rest on the side closures, and a pocket to accommodate a work-sheet extending downwardly at the rear of the carriage and to serve as a closure for the rear of said frame, said pocket being attached to said lateral extensions at the rear thereof, and a cover to close the top of said pocket and said lateral extensions.

Y 7. Sound-deadening means for a typewriter with a frame having openings in the sides and back and a traveling carriage on said frame, said sound-deadening means comprising a back closure in the form of a pocket open at the top to receive the end of a work-sheet hanging down from the carriage at the rear, the front wall of the pocket engaging the back of the frame and the pocket being of substantially the saine length as the travel of the carriage.

8. Sound-deadening meansy for a typewriter with a frame havingopenings in the sides and back and a traveling carriage on said frame, said sound-deadening means being supported by said franieand comprising a back closure in the vform of a pocket open at the top to receive the end of a worksheethanging down from the carriage at lthe rear, the front wall of the pocket engaging the back of the frame and the pocket being of substantially the same length as the travel of the carriage.

9. Sound-deadening means for a typewriting machine, comprising plates closing the bottom, sides and frontthereof, and a working chamber for the carriage anddepending work-sheets closing the top and rear ofthe machine, and supported by the end platesand machine-frame.

l0. Sound-deadening'means for a typewriting machine having key-levers and Va frame from which said key-leversproject and having a front opening above the keylevers, said sound-deadening means compris- Yers ing side extensions mounted on said frame Y to accommodate vthe travel of the carriage, a cover to close said side extensions at the top, anda plate secured to the front edges .of said extensions to close said opening in the frame. i

l1. Sound-deadening means for a typewriting machine, said machine having keylevers, said machine having an opening above said key-levers, an opening below said key-levers, and yan opening at the bottom, saidV sound-deadening means comprising 'a plate mounted on said machine for closing said bottom opening, and an upward extension on said plate for closing said opening below the key-levers, and a plate carried by said machine for closing said opening above said key-levers. y

12. Sound-deadening means for a typewriting machine, said machine having a carriage and an opening at the top, said sounddeadening means comprising a closure for Asaid opening, said closure comprising extensions mounted on said machine and over which said carriage operates, and a cover extending over said machine and said extensions.

13. Sound-deadening means for a type- .writing machine, said machine having openings at the top and sides, said sound-deadeniiig means comprising a closure mounted on the machine for closing each side opening, and a closure for said top opening, said last-named closure being mounted on said side closures, and forming therewith a working chamber for the carriage. l

lSound-deadening means for a typewriting machine, said machine having a carriage and openings at the top and sides, said sound-deadening means comprising plates mounted on the machine for closing said side openings, extensions mounted on llO said plates and over Which said carriage operates, and a cover enclosing said extensions and the top of said machine.

15. Sound-deadening means for a type- Writing machine, said machine having a earriage and openings at the top and sides, said sound-deadening means comprising a lclosure mounted on the machine for closing each side opening, a pocket mounted on said machine and in which operate Work-sheets carried by said carriage, said pocketY being open at the top, and a closure mounted on said pocket for closing the top of said machine and said pocket.

16 Sound-deadening means for a typewi'iting machine, comprising plates closing the bottom,.sides and front thereof,and a working chamber for the carriage and depending Work-sheets closing the top and i'ear of the machine, and supported by the end plates and machine-frame, the chamber having a portion at the rear dependingto the bottom of the machine and closing the rear thereof, in which the depending Worksheets travel.

17. Sound-deadening means for a type- Writing machine, said machine having a carriageand openings atthe top and sides, said sound-deadening means comprising a closure mounted on the machine `:for closing each side opening, extensions mounted on the side closures, a pocket mounted on said extensions and in which operate Work-sheets carried by said carriage, said pocket being open at the top, and a closure `mounted on said Vpocket and extending over said extensions for closing said top opening and the top of said pocket. V

18. Sound-deadening means for a typewriting machine, said machine having a carriage and openings at the top, rear and sides, said sound-deadening means comprising plates mounted on the machine for closing said side openings, extensions mounted on said plates and over Which said carriage operates, a pocket mounted on said extensions and in which operate the overhanging ends of Work-sheets carried by said carriage,

said pocket being open at the top and closing said rear opening, and a cover mounted on said pocket and extending over said extensions for closing said top opening and the top of said pocket.

19. Sound-deadening means for a type- Writing machine, said machine having a carriage and openings at the top and bottom, said sound-deadening means comprising a closure for said bottom opening, a pocket open at the top mounted on said closure and in which operate the overhanging ends of Work-sheets carried by the carriage, and means for closing the opening at the top of the machine and the top of said pocket.

20. Sound-deadeningy means for a type- Writing machine, said machine having a carsaid sound-deadening means comprising a plate for closing said bottom opening, a pocket open at the tcp mounted on said .plate and 1n Which operate the overhanging ends of Work-sheets carried by the carriage,

saidl pocket being closed at the bottom, the

plate extended to lap upon the bottom of the pocket and secured thereto, and meanslfor closing the opening at the top of the machine and the top of said pocket.

22. Sound-deadening means for a typeivriting machine, said machine having keylevers, a carriage, and various operating levers extending` forwardly `from said cai'- y riage, said machine having a top opening and a front openingrabove said key-levers, said .sound-deadening` means comprising means secured to said machine for closing said front opening, means secured to said machine for closing said top opening, said first-named means and said second-named means forming a slot at the front through which said carriage-operating levers extend.

23. Sound-deadening means for a type- Writing machine, comprising a Working vchamber for the carriage and'Work-sheets depending` therefrom, and closures secured to the bottom, sides and front of the type- Writing machine, the carriage Working chamber secured to said bottom and side closures.

24. Sound-deadeningmeans for a type- Wi'iting machine, comprising a Working chamber for the carriage and Work-sheets depending therefrom, and closures secured to the bottom, sides and front of the type- Writing machine, the carriage working chamber secured to the bottom and side closures, and co-operating with the front closure to form a slot for the operating handles of the machine.

25. Sound-deadening means for a type- Writing machine, said machine having keylevers, a carriage, various operating levers extending forwardly from said carriage, said machine having openings at the bottom, sides, top, and at the front above and below said key-levers, said sound-deadening means comprising a plate mounted on said machine for closing said bottom opening, said plate having an upward extension for closing the opening beneath the key-levers, 'a front plate mounted on said machine Jfor closing the opening above the key-levers, side plates mounted'on said machine fo` closing saidv side openings,` extensions mounted on said side plates and on said front plate and over which said carriage operates, a pocket supported upon the bottom plate and attached to said extensions and in which operate the overhanging ends of work-sheets carried by said carriage, said pocket being closed at the bottom to form a continuation of the bottom plate and being` open at the top, and a cover mounted on said pocket and extending over said extensions for closing the top openings of the machine and the pocket, said cover forming with said front plate a slot at the front through which said carriageoperating` levers extend.

26. The combination with a typewriting machine comprising a main frame closed at the bottom and sides and a carriage traveling on said frame, of a paper-pocket to receive a work-sheet hanging down from the rear of the carriage and having a front wall to engage the back of the frame and act as a closure therefor, and a dome to accommodate the travel of the carriage and to co-operate with said frame and paper-pocket to enclose the upper part of the machine.

27. rThe combination with a typewriting machine comprising key-levers, a main frame closed at the bottom, sides and back and havingan opening at the front' above the key-levers and a carriage to travel on said frame, of a sound-deadening dome to close the top of the machine and accommodate the travel of the carriage,said dome comprising side extensions beneath the path of the carriage and secured to the sides of the frame, a front plate attached to the front edges of said extensions and closing the front opening in the frame, and a cover to close the tops of the extensions, the side walls of the cover passing outside of the ends of said extensions and the cover being provided with portions to engage the front plate and limit the downward movement of the cover.

28. A typewriting machine comprising a frame closed at the back, sides and bottom, a paper carriage at the top of said frame, and means to close the top of said frame to form a chamber to enclose the carriage andaccommodate the travel thereof, said chamber being supported by the frame of the machine.

29. A typewriting machine comprising a frame closed at the sides and bottom, a paper carriage at the top of said frame, closing means for the top of said frame having lateral extensions on the frame to form a chamber in which the carriage operates, and closing means for the back of the frame forming a chamber extending downwardly from said first-named means at the back of the machine to receive'the overhanging end of a worksheet on the carriage.

30. In combination, a typewriting machine having` a framework, a sounddeadeningy hood above the framework and pro-.

viding a working chamber for the carriage and forming an air-pocket confining the sound rising from the machine, and means securing said hood upon said framework, said hood including a cover-part liftable from over the carriage while the hood remains secured to the framework.

31.111 combination, a typewriting ma-V chine having ak framework, a sound-deadening hood above the framework and pr0vid ing a working chamber for the carriage and forming an air-pocket confining the sound rising from the machine, and means securing said hood upon said framework, said hood including a cover-part liftable from over the carriage while the hood remains secured to the framework, said chamber having a depending portion closing the rear of the machine-frame and secured to said frame and providing a pocket for the travel of depending work-sheets.

32. In combination, a typewriting machine having a framework, a sound-deadening hood above the framework and providing a working chamber for the carriage and forming an air-pocket confining` the sound rising from the machine, means securing said hood upon said framework, said hood including a cover-part liftable from over the carriage while the hood remains secured to the framework, said chamber having a depending portion closing the rear of the machine-frame and secured to said frame and providing a pocket for the travel of depending worksheets, and closures secured to the bottom, sides and front of the machine-frame. y

B3. In combination, a typewriting machine having a framework, a sound-deadening hood above the framework and provid ing a working chamber for the carriage and forming an air-pocket confining the sound rising from the machine, and means secur ing said hood upon said framework, said hood including a cover-part liftable from over the carriage while the hood remains secured to the framework, said hood closing the top and rearof the machine-frame and secured to the rear thereof.

34. rlhe combination of a typewriting machine having a framework provided with feet, a sound-subduing casing secured to said framework, said casing including a fiooring beneath said framework, said fiooring being secured at-the other side of said framework by means of said feet extending beyond the framework, said casing also including a body-portion set down upon the flooring, and means securing said body-portion to said flooring7 the casing also including a top for said body-portion.

35. The combination with a typewriting machine having a framework provided with feet, of va sound-subduing casing secured to said framework, said kcasing including a ooring beneath said framework, said flooring being secured to the under side of said lframework by means of said feet and extending beyond the framework, said casing 10 the flooring and the bottom of the easingbody.

JOHN WALDHEIM. 

